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126 Characteristics of Identified Morphology Of Buletinul AŞM. Ştiinţele vieţii. Nr. 3(327) 2015 Zoologia Buletinul AŞM. Ştiinţele vieţii. Nr. 3(327) 2015 Zoologia CHARACTERISTICS OF IDENTIFIED MORPHOLOGY OF GENUS SCHISTURA MCCLELLAND, 1838 IN THE GIANH RIVER BASIN FROM VIETNAM Ho Anh Tuan Vinh University, Nghe An province, Vietnam Rezumat Genul Schistura McClelland, 1838 este reprezentat de 193 specii, dintre care 29 specii sunt răspândite, cu precădere, în sectoarele superioare ale râurilor din Vietnam. În urma studiului au fost supuse analizei 248 exemplare a genului Schistura McClelland, 1838 capturate în bazinul r. Giahn, Vietnam. S-au identificat 4 specii:Schistura finis Kottelat, 2000; Schistura hingi (Herre, 1934); Schistura kottelati Tuan et al, 2015; Schistura pervagata Kottelat, 2000. Două specii: Schistura finisKottelat, 2000 и Schistura kottelati Tuan et al, 2015 sunt semnalate în premieră. 126 Buletinul AŞM. Ştiinţele vieţii. Nr. 3(327) 2015 Zoologia Buletinul AŞM. Ştiinţele vieţii. Nr. 3(327) 2015 Zoologia Cuvinte-cheie: ihtiofauna, biodiversitate, caractere morfometrice, ecosisteme acvatice. Depus la redacţie: 26 octombrie 2015 --------------------------------------------------------------------------------------------------------- Adresa pentru corespondenţă: Ho Ahn Tuan, Universitatea de Stat din Moldova, str. Alexe Mateevici 60, MD-2009 Chişinău, Republica Moldova; e-mail: [email protected] ; tel. (+373) 68 347 121 Introduction According to Maurice Kottelat (2012), Genus Schistura McClelland, 1838 consists 193 species, in which 29 species mainly distribute in the upper small parts of stream and rivers in Vietnam. In all studies of genus Schistura McClelland, 1838 mentioned that their species are mainly endemic and limited distribution, rare species in common distribution [8, 1]. In the Gianh river basin, different studies of genus Schistura McClelland, 1838 showed different species composition results, such as Nguyen Thai Tu at al (1999) reported 2 species: Schistura fasciolata and Schistura incerta [12]; Nguyen Thai Tu & Ho Anh Tuan (2003) showed 2 species: Schistura fasciolata, Schistura incerta and 18 phenol. And Ngo Sy Van & Tran Anh Tuan (2003) indicated 3 species: Schistura caudofurca, Schistura fasciolata, Schistura incerta and 1 phenol [13]. In the mainstream of Gianh River, Mai Thị Thanh Phuong et al indicated 7 species: Schistura aramis, Schistura huongensis, Schistura carbonaria, Schistura psittacula, Schistura hingi, Schistura susannae, Schistura fasciolata and 1 phenol [11]. Moreover, Freyhof & Serov (2011) pointed that 2 species of this genus in the Gianh river: Schistura hingi and Schistura pervagata [1]. Due to these different results genus Schistura McClelland, 1838 of ichthyoslogists, we have already exchanged specimens and anlysed data with Maurice Kottelat and Freyhof to solve problem. From that condition, we strengthen to research the project “Characteristics of identified morphology of genus Schistura McClelland, 1838 in the Gianh river basin from Vietnam” Material and methods Fish specimens were collected mainly from fishing men in these survey regions. Fishing tools are fishnets, rackets, casting – net, multi size fishing – rods and also professional tools of fish men such as: fishing basket, fishing traps, etc. Some other specimens was bought from local people. All samples were given full information in field trip diary, sampling notes, taking pictures and fixed with formaline 8- 10% and reserving with formaline 5% in Animal Laboratory of Department of Biology, Vinh University. Note of figure 1: A: Standard length; B: Total length; C: Dorsal head length; D: Lateral head length; E: Predorsal length; F: Pre-pelvic length; G: Pre-anus length; H: Preanal length; K: Head depth (at eye); L: Head depth (at nape); M: Body depth; N: Depth of caudal peduncle; O: Length of caudal peduncle; I: Snout length; Q: Head width (at nares); R: Body width (dorsal origin); S: Body width (anal origin); T: Eye diameter; U: Interorbital width; V: Height of dorsal fin; Z: Length of upper caudal lobe; W: Depth of anal fin; X: Length of pelvic fin; Y: Length of pectoral fin; CC: Barbel length; AA: Lateral head length; BB: Not lateral head length. 127 Buletinul AŞM. Ştiinţele vieţii. Nr. 3(327) 2015 Zoologia Buletinul AŞM. Ştiinţele vieţii. Nr. 3(327) 2015 Zoologia Figure 1. Measurements taken on Schistura species by Maurice Kottelat. Results and discussion By the time of sample collection, indentification, and exchange specimens and thankful helps of Maurice Kottelat and Freyhof, we have already indentified 4 species of genus Schisturs McClelland, 1838 in the Gianh river basin from Vietnam. They are discribed in morphological characteristics as below 2.1. Schistura finis Kottelat, 2000 (n = 86) Diagnosis Distinguished from all other species of the genus in Southeast Asia by the following combination of characters: body and head massive, cylindrical; snout blunt; cheeks slightly swollen in individuals larger than about 80 mm SL; no median notch in upper lip; lower lip with a median incision; lower jaw with a median notch. (Figure 2, Table 1) Table 1. Morphometric data of Schistura finis& Schistura hingi. Morphometric data Schistura finis (n = 86) Schistura hingi (n = 64) In percents of SL Mean Min Max SD Mean Min Max SD 1 2 3 4 5 6 7 8 9 Total length 120.5 119.8 121.2 0.7 120.4 118.7 123.4 1.7 Dorsal head length (HL) 19.5 19.1 20.0 0.4 22.0 21.1 23.7 0.8 Lateral head length 21.9 21.7 22.1 0.2 24.4 23.8 25.0 0.4 Predorsal length 53.3 52.2 54.3 1.0 53.6 51.3 55.7 1.3 Pre-pelvic length 51.3 51.2 51.4 0.1 54.6 53.7 56.3 1.1 Pre-anus length 68.2 67.5 69.0 0.8 69.3 67.6 72.6 1.6 Preanal length 77.4 77.1 77.7 0.3 79.1 77.2 82.5 1.7 Head depth (at eye) 9.6 9.5 9.8 0.2 11.4 10.6 12.4 0.6 Head depth (at nape) 12.2 11.9 12.5 0.3 13.9 12.6 14.7 0.8 Body depth 17.9 16.8 18.9 1.0 18.0 15.2 20.9 2.0 Depth of caudal peduncle 11.9 11.4 12.3 0.5 15.0 12.8 17.2 1.6 Length of caudal peduncle 17.4 17.0 17.7 0.4 14.8 13.5 15.8 0.8 Snout length 9.4 9.3 9.6 0.2 11.6 11.1 12.2 0.4 128 Buletinul AŞM. Ştiinţele vieţii. Nr. 3(327) 2015 Zoologia Buletinul AŞM. Ştiinţele vieţii. Nr. 3(327) 2015 Zoologia Table 1 (Continued) 1 2 3 4 5 6 7 8 9 Head width (at nares) 10.1 10.0 10.1 0.0 13.3 10.9 14.8 1.2 Maximum head width 14.9 14.7 15.1 0.2 16.7 15.2 18.7 1.2 Body width (dorsal origin) 11.9 11.6 12.2 0.3 14.5 12.1 16.7 1.5 Body width (anal origin) 7.3 7.0 7.6 0.3 9.0 7.6 10.3 0.9 Eye diameter 3.9 3.6 4.2 0.3 4.2 3.7 4.9 0.4 Interorbital width 6.2 5.9 6.5 0.3 7.7 6.9 8.9 0.7 Height of dorsal fin 18.2 18.0 18.4 0.2 20.7 19.2 21.7 0.9 Length of upper caudal lobe 20.0 19.9 20.2 0.1 21.8 19.9 23.2 1.3 Length of lower caudal lobe 20.2 19.4 21.1 0.8 21.5 18.8 23.7 1.7 Length of median caudal 16.2 16.1 16.3 0.1 16.8 15.7 17.5 0.6 rays Depth of anal fin 15.6 14.9 16.2 0.7 16.7 15.9 18.0 0.7 Length of pelvic fin 15.2 14.7 15.6 0.5 17.3 16.1 18.6 1.0 Length of pectoral fin 18.2 17.5 19.0 0.7 19.5 17.9 21.2 1.2 Barbel length 7.2 6.6 7.8 0.6 8.4 7.0 9.7 1.0 In percents of HL Lateral head length 112.0 108.4 115.5 3.6 110.6 103.6 115.4 4.1 Head depth (at eye) 49.2 48.9 49.6 0.3 52.0 50.2 56.5 2.1 Head depth (at nape) 62.3 62.1 62.5 0.2 62.9 57.0 66.6 3.2 Body depth 91.7 84.3 99.1 7.4 81.5 68.8 92.3 7.5 Snout length 48.3 48.0 48.7 0.3 52.6 50.1 55.0 1.6 Head width (at nares) 51.6 50.3 53.0 1.3 60.1 49.2 64.0 5.2 Maximum head width 76.2 75.6 76.8 0.6 75.9 69.0 79.9 3.9 Eye diameter 19.8 18.8 20.8 1.0 18.9 17.1 22.1 1.8 Interorbital width 31.8 29.3 34.2 2.5 35.1 31.2 37.7 2.7 Height of dorsal fin 93.3 92.2 94.5 1.2 94.1 87.8 100.1 4.7 Depth of anal fin 79.6 77.9 81.3 1.7 75.8 71.7 82.7 3.7 Length of pelvic fin 77.5 76.9 78.2 0.6 78.7 70.9 85.5 6.1 Length of pectoral fin 93.3 91.6 95.0 1.7 88.5 81.3 97.0 6.0 Barbel length 37.0 33.1 40.8 3.9 38.0 31.8 45.8 5.0 Colour pattern Body greyish brown with poorly contrasted pattern in adults.
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